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Fall 2001 Weather History at San Francisco International Airport United States

This report shows the past weather for San Francisco International Airport, providing a weather history for the fall of 2001. It features all historical weather data series we have available, including the San Francisco International Airport temperature history for the fall of 2001. You can drill down from year to month and even day level reports by clicking on the graphs.

San Francisco International Airport Temperature History in the Fall of 2001

History:200520042003200220012000199919981997
Temperature history in the Fall of 2001 at San Francisco International AirportSepOctNov40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FSummerWinter
The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

Hourly Temperature in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Hourly Temperature in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWintercoldcoolcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Cloud Cover in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Cloud Cover in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWinter
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
no significant cloudno cloud detectedceiling and visibility ok
The hourly reported cloud coverage, categorized by the percentage of the sky covered by clouds.

Daily Precipitation in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Daily Precipitation in the Fall of 2001 at San Francisco International AirportSepOctNov0.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 in1.2 in1.2 inSummerWinter
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Observed Weather in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWinter
foghazedrizzlelight rainmoderate rainheavy rainfreezing rainsleetsnow grainslight snowmoderate snowheavy snowhailthunderstorm
The hourly observed weather, color coded by category (in order of severity). If multiple reports are present, the most severe code is shown.
DayObservationsPrecipitationCodes
Sun, Sep 2 Patches of FogBCFG
Fri, Sep 14 MistBR
Sat, Sep 15 Patches of Fog0.00 inBCFG, IWC41
Sun, Sep 16 Mist0.00 inBR
Wed, Sep 19 Patches of FogBCFG
Thu, Sep 20 Haze, MistHZ, BR
Fri, Sep 21 Patches of FogBCFG
Sat, Sep 22 Haze, Fog, Mist, Patches of FogHZ, FG, BR, BCFG
Mon, Sep 24 Thunderstorm, Thunderstorm in the Vicinity, Thunderstorm with Light Rain, Thunderstorm with Rain, Light Rain, MistTS, VCTS, -TSRA, TSRA, -RA, BR
Tue, Sep 25 Light Rain, Mist-RA, BR
Tue, Oct 2 Haze, Mist, Patches of FogHZ, BR, BCFG
Wed, Oct 3 Haze, MistHZ, BR
Tue, Oct 9 HazeHZ
Mon, Oct 15 MistBR
Tue, Oct 16 Haze, Mist, Patches of FogHZ, BR, BCFG
Thu, Oct 18 HazeHZ
Fri, Oct 19 HazeHZ
Mon, Oct 22 HazeHZ
Tue, Oct 23 MistBR
Wed, Oct 24 Haze0.00 inHZ, IWC05
Thu, Oct 25 HazeHZ
Sat, Oct 27 Haze, MistHZ, BR
Sun, Oct 28 Haze, MistHZ, BR
Mon, Oct 29 Light Rain-RA
Tue, Oct 30 Rain, Light Rain, MistRA, -RA, BR
Wed, Oct 31 Patches of FogBCFG
Thu, Nov 1 Mist, Patches of FogBR, BCFG
Sat, Nov 3 Haze, Mist, Patches of Fog, Sky-Obscuring Fog0.01 inIWC05, IWC10, BR, BCFG, IWC41, IWC45
Sun, Nov 4 MistBR
Fri, Nov 9 HazeHZ
Sat, Nov 10 Heavy Rain, Rain, Light Rain, Haze, Fog, Mist+RA, RA, -RA, HZ, FG, BR
Sun, Nov 11 Rain, Light Rain, MistRA, -RA, BR
Mon, Nov 12 Heavy Rain, Rain, Light Rain, Mist+RA, RA, -RA, BR
Tue, Nov 13 Light Rain-RA
Wed, Nov 14 Light Rain0.00 in-RA, IWC61
Thu, Nov 15 Haze, Mist, Patches of Fog0.00 inHZ, BR, BCFG
Fri, Nov 16 Haze, MistHZ, BR
Sat, Nov 17 Patches of FogBCFG
Sun, Nov 18 MistBR
Mon, Nov 19 Light Rain, Haze, Mist-RA, HZ, BR
Wed, Nov 21 Light Rain, Mist-RA, BR
Thu, Nov 22 MistBR
Sat, Nov 24 Small Hail and Rain, Heavy Rain, Rain, Light Rain, Fog, MistGSRA, +RA, RA, -RA, FG, BR
Wed, Nov 28 Heavy Rain, Rain, Light Rain, Mist+RA, RA, -RA, BR
Thu, Nov 29 Heavy Rain, Light Rain, Mist+RA, -RA, BR
Fri, Nov 30 Light Rain-RA

Hours of Daylight and Twilight in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Hours of Daylight and Twilight in the Fall of 2001 at San Francisco International AirportSepOctNov0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSummerWinterSep 2212 hr, 9 minSep 2212 hr, 9 minnightnightdaydayNov 309 hr, 46 minNov 309 hr, 46 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Sunrise & Sunset with Twilight and Daylight Saving Time in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSummerWinter6:30 AM6:30 AMOct 285:15 PMOct 285:15 PM6:39 AM6:39 AMSep 17:38 PMSep 17:38 PM7:05 AM7:05 AMNov 304:51 PMNov 304:51 PM6:56 AM6:56 AMSep 217:07 PMSep 217:07 PMDSTOct 28DSTOct 28
The solar day over the course of the Fall of 2001. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Solar Elevation and Azimuth in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Solar Elevation and Azimuth in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSummerWinter002020303050600010103040
northeastsouthwest
Solar elevation and azimuth in the the fall of 2001. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon Rise, Set & Phases in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Moon Rise, Set & Phases in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSummerWinterAug 310:56 PMAug 310:56 PMAug 187:56 PMAug 187:56 PMSep 22:44 PMSep 22:44 PMSep 173:28 AMSep 173:28 AMOct 26:49 AMOct 26:49 AMOct 1612:24 PMOct 1612:24 PMOct 319:42 PMOct 319:42 PMNov 1410:41 PMNov 1410:41 PMNov 3012:50 PMNov 3012:50 PMDec 1412:48 PMDec 1412:48 PMDec 302:41 AMDec 302:41 AM8:20 PM8:20 PM6:30 AM6:30 AM7:59 PM7:59 PM7:16 AM7:16 AM7:01 AM7:01 AM7:55 PM7:55 PM6:56 PM6:56 PM7:04 AM7:04 AM7:01 AM7:01 AM6:55 PM6:55 PM5:19 PM5:19 PM6:54 AM6:54 AM4:58 PM4:58 PM5:01 PM5:01 PM7:55 AM7:55 AM4:56 PM4:56 PM4:27 PM4:27 PM7:46 AM7:46 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity Comfort Levels in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Humidity Comfort Levels in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWinter
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The hourly reported humidity comfort level, categorized by dew point. The shaded overlays indicate night and civil twilight.

Wind Speed in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Wind Speed in the Fall of 2001 at San Francisco International AirportSepOctNov0 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mph50 mph50 mph60 mph60 mphSummerWinter
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Hourly Wind Speed in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWinter
0 mph calm 1 mph light air 4 mph light breeze 8 mph gentle breeze 13 mph moderate breeze 18 mph fresh breeze 25 mph strong breeze 31 mph near gale 39 mph gale 47 mph strong gale 55 mph storm 64 mph violent storm 73 mph hurricane force
The hourly reported wind speed, color coded into bands according to the Beaufort scale. The shaded overlays indicate night and civil twilight.

Hourly Wind Direction in 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Hourly Wind Direction in 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWinter
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in the Fall of 2001 at San Francisco International Airport

History:200520042003200220012000199919981997
Atmospheric Pressure in the Fall of 2001 at San Francisco International AirportSepOctNov29.4 inHg29.4 inHg29.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHgSummerWinter
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

Reports by Month

Reports by Month at San Francisco International Airport1940195019601970198019902000201020201948194819491949195019501951195119521952195319531954195419551955195619561957195719581958195919591960196019611961196219621963196319641964196519651966196619671967196819681969196919701970197119711972197219731973197419741975197519761976197719771978197819791979198019801981198119821982198319831984198419851985198619861987198719881988198919891990199019911991199219921993199319941994199519951996199619971997199819981999199920002000200120012002200220032003200420042005200520062006200720072008200820092009201020102011201120122012201320132014201420152015201620162017201720182018201920192020202020212021202220222023202320242024
METARISDboth
The number of reports per month over the entire history of this station.

Number of Reports by Day in the Fall of 2001 at San Francisco International Airport 2001

Number of Reports by Day in the Fall of 2001 at San Francisco International AirportSepOctNov002020404060608080100100SummerWinter
regularspecialcorrection
The number of reports per day.

Reports by Hour in the Fall of 2001 at San Francisco International Airport 2001

Reports by Hour in the Fall of 2001 at San Francisco International AirportSepOctNov12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMSummerWinter
regularspecialcorrection
Indication of what types of reports were recorded during each hour.

This report graphically illustrates the historical weather reports recorded by the weather station at San Francisco International Airport in the fall of 2001.

METAR Reports

Airport weather stations throughout the world routinely issue METAR weather reports . Such reports are used by pilots, air traffic controllers, meteorologists, climatologists, and other researchers. They are published via radio transmission and on the internet. We have been collecting and archiving published METAR reports since 2011, and have found third-party sources for archived reports from years prior to that.

ISD Reports

The Integrated Surface Database (ISD), maintained and published by NOAA's National Center for Environmental Information , consists of hourly and synoptic weather reports from a variety of sources. We use ISD data to complement and backfill for our METAR archive.

Other Data

The sources for the averages shown in the daily temperature chart are discussed in greater detail on this station's Averages Report.

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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